Ummah

Ummah (أمة‎) is an Arabic word meaning "community" or "nation".[1] In Islam the word is used to refer to the collective worldwide body of Muslim believers,[2] including both the Muslim population of Dar al-Islam and the Muslim population of Dar al-Harb who are living outside the lands where Islam rules. The leader of the ummah is known as the Caliph.